How to change or convert mbr to gpt without data loss?

Manual partition cloning is an advanced, risky, and complex method to convert MBR to GPT without data loss. It involves creating a new GPT disk, copying all partitions from the old disk, and adjusting the boot configuration accordingly. Here's an overview of how it works and what it involves:

Steps of converting MBR to GPT:

1. Create a new GPT disk:
    Use a tool like Disk Management or third-party tools to initialize a new disk as GPT.
2. Clone all partitions:
   Use free cloning software to clone each partition from the MBR disk to the GPT disk.
   Ensure the cloned partitions are identical and in the same order.
3. Repair or recreate the bootloader:
   Since Windows boot records are different between BIOS/MBR and UEFI/GPT, you'll need to:
   Boot into a Windows recovery environment.
   Use tools like bootrec and bcdboot to fix the EFI bootloader.
4. Switch BIOS to UEFI mode:
   Enter your BIOS/UEFI settings and change the boot mode from Legacy BIOS to UEFI.
5. Test booting Windows:
   Boot from the new GPT disk and verify everything works.

While technically feasible, manual partition cloning is complex and risky for most users. It’s mainly used by advanced users or IT professionals.